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Thursday 7 August 2014

1-Ethylpropylamine NMR




1-Ethylpropylamine

Formula: C5H13N


IR spectrum

The two bands at 3388 and 3292 indicate a primary amine (-NH2). The bands at 3000-2850 indicate C-H alkane stretches.



C5H13N
Rule 3, omit the N and one H, gives C5H12
5 - 12/2 + 1 = 0 degrees of unsaturation.
No pi bonds or rings.
13 C NMR
................

1H NMR





NMR answer
Note that C is showing as 2 2H peaks, instead of a 4H peak. This may be caused by a similar effect as in Problem 4 - on each carbon C, the H closer to the N will be in a slightly different environment. If the rotation of this carbon is hindered, these Hs may have a different chemical shift.








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